Optical Camouflage

From The 4400 Wiki, a fan encyclopedia that anyone can edit.

Optical Camouflage is a promicin-induced ability that allows its user to disguise him or herself as someone else, looking, sounding, smelling, acting etc. the exact same way as another person so lookers can't tell the difference. Though this ability works on all people, it cannot fool technology e.g. security cameras, as they can see through the illusion.

4400 Boyd Gelder had this ability.